Coupling-pole.



PATENTED DEC. 11, 1906.

D. B. CAMPBELL.

COUPLING POLE.

APPLICATION mam JAN.24.1906.

2 SHEETS-SHEET 1.

wit/mango PATENTED DEC. 11, 19061 D. B. CAMPBELL.

COUPLING POLE.

APPLICATION FILED JAN.24.190G.

2 SHEETS-SHEET 2.

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DALLAS B. CAMPBELL. OF SMITHFIELD, WEST VIRGINIA.

COUPLING-POLE.

Specification of Letters Patent.

Application filed January 24, 1906. Serial No: 297.696.

To all whmn it may concern:

Be it known that I, DALLAS B. CAMPBELL, a citizen of the United States, residing at Smithfield, in the county of Wetzel, State of I/Vest Virginia, have invented certain new and useful Improvements in Coupling-Poles and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to coupling-poles, and more particularly to that class which are used to connect a threshing-machine and a traction-engine when it is desired to back the threshing-machine into a barn or between stacks of hay, thereby permitting use of the engine elsewhere after the threshing-machine has been thus moved.

The primary object of the invention is to obviate the movement of the threshin -machine by horse-power, which has been found to be extremely dangerous and inconvenient.

In the accompanying drawings, Figure 1 is an elevation ofa portion of a threshing-machine and of an engine, showing the same coupled by means of my coupling-pole. Fig. 2 is a horizontal sectional view on the line 2 2 of Fig. 1. Fig. 3 is a detail view of one of the snap-hook members, and Fig. 4 is a similar view of one of the chain-adjusting devices.

Referring to the drawings, the numeral 5 denotes a threshing-machine, and 6 a traction-engine, and the numerals 7 and 8 denote the front axles of the threshing-machine and traction-engine, respectively. Secured to the front of the bolster of the threshing-machine and the traction-engine are brackets 9, including spaced ears 10, between which are received lips 11 on the ends of a pole 12.

In order that the threshing-machine may be guidedduring its movement, I provide a suitable steering mechanism, which includes a drum 13, rotatably mounted beneath the threshing-machine 5 and in rear of the bolster of the said machine. The said drum 13 is preferably mounted upon and secured to a shaft 14, which latter is mounted in suitable brackets upon the under side of the said ma chine and is provided upon one of its ends with a pinion l5 and is in mesh with a wormgear 16, carried by the lower end of a rod 17, rotatably mounted in suitable brackets 18 upon the side of the machine, and which is ppovided at its upper end with a crank-hane 19.

Secured upon the axle of the threshingmachine are snap-hook members 19, including each a hook member 20, which has the bill of its hook beveled. Each of the snaphook members also includes a shank 21, to which is pivoted an arm 22, which has its end beveled to correspond to the bevel of the bill of the hook against which it is adapted to seat. Secured in any suitable manner to the shank 21 is a leaf-spring 23,'which has its free end bearing against the arm 22 beyond its pivot-point.

Engaged around the drum 13 is a chain 24, which is connected at its ends with eyes 25, formed on one end of threaded stems 26, which is engaged through one of the openings Patented Dec. 11, 1906.

in a turnbuckle 27. Throiwh the other of l the openings in said turnbuckle is en aged a threaded stem 28, which is provided at its outer end with an eye. 29, arranged for engagement with one of the snaphook memers.

From the foregoing it will be seen that the threshing-machine may be guided during its travel and that the steering-chain may be adjusted when so desired. In case it is desired to make an extremely short turn, in which event the front wheels of the machine would be turned almost at right angles to their normal position, the eye 29 of the stem 28 may be disengaged from the snap-hook members, thereby allowing free movement of the said wheels.

What is claimed is 1. In a device of the class described the combination with a vehicle and its bolster, of a drum rotatably mounted beneath the vehicle, a chain engaged around the said drum, means carried by the bolster for the detachable connection of the chain therewith, and means for preventing accidental disengagement of the chain therefrom.

2. In a device of the class described the combination with a vehicle and its bolster, of

its ends to the bolster of said vehicle, and hicle, a chain engaged around the said drum, means for adjusting the length of said chain. 10 and latch means carried by the bolster for In testimony whereof I atliX my signature the detachable connection therewith. in presence of two Witnesses.

-5 3. In a device of the class described the DALLAS B. CANIPBELL.

combination With a vehicle, of a drum rotaa drum rotatably mounted beneath the ve- Witnesses tably mounted beneath said vehicle, a chain JOHN J. BARRETT, engaged around said drum and connected at WILLIAM P. ORIM. 

